MQ vulnerability

What happened

IBM MQ could allow an authenticated attacker to cause a denial of service or potentially escalate privileges due to a heap buffer overflow when processing MQPUT operations with malformed distribution headers.

Affected versions

MQ: 9.1.0.0 through 9.1.0.37 LTS (semver); 9.2.0.0 through 9.2.0.43 LTS (semver); 9.3.0.0 through 9.3.0.41 LTS (semver); 9.3.0.0 through 9.3.5.1 CD (semver); 9.4.0.0 through 9.4.0.25 LTS (semver); 9.4.0.0 through 9.4.5.1 CD (semver); 10.0.0.0 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.